Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6426155 | Magnetic hard disc substrate and process for manufacturing the same | Kiyoshi Tada, Kenji Tomita, Tomoya Utashiro | 2002-07-30 |
| 6378338 | Method for producing magnetic disk substrates | Kazuyoshi Nishizawa, Kiyoshi Tada | 2002-04-30 |
| 6258458 | Magnetic disk substrate | Kazuyoshi Nishizawa, Kiyoshi Tada | 2001-07-10 |
| 6123603 | Magnetic hard disc substrate and process for manufacturing the same | Kiyoshi Tada, Kenji Tomita, Tomoya Utashiro | 2000-09-26 |